Opera used to be big player when they were slim and fast browser but they lost lot of users when they desided to incorporate lots of useless bloat.

So when did Opera stop being slim and fast? Its install is still small, it's fast and to me personally it still "feels" like one of the more faster browsers. Yes, there is a lot of stuff I don't need (like the mail client, widgets and now Unite), but really, I never had the mail client, some widget or Unite pop up without any reason! It's there, but if you don't use it you won't even notice it. If that is your definition of bloat than just about anything can be called "bloated"